As a writer it is important to value your craft and take pride in your work. Along with proper grammar and punctuation, correct formatting is also important to make your book readable. I once had a fellow writer who was promoting her book on Face Book. I went on Amazon to check it out and realized it had no proper formatting. Sentences ran into each other with no separation or paragraphs. It was unreadable. I reached out to the person via private message relaying what I had discovered and was shocked when the individual acknowledged that she was aware of it. I found it mind-boggling that someone would promote a book knowing it was next to impossible to read. Weeks later when I checked back it remained the same.
There is no point in publishing a book if no one can read it. Do not make that mistake. Good luck and happy writing.